<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Text_Table
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: Row.php 18951 2009-11-12 16:26:19Z alexander $
 */

/**
 * Row class for Zend_Text_Table
 *
 * @category  Zend
 * @package   Zend_Text_Table
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Text_Table_Row
{
	/**
	 * List of all columns
	 *
	 * @var array
	 */
	protected $_columns = array();

	/**
	 * Temporary stored column widths
	 *
	 * @var array
	 */
	protected $_columnWidths = null;

	/**
	 * Create a new column and append it to the row
	 *
	 * @param  string $content
	 * @param  array  $options
	 * @return Zend_Text_Table_Row
	 */
	public function createColumn($content, array $options = null)
	{
		$align    = null;
		$colSpan  = null;
		$encoding = null;

		if ($options !== null) {
			extract($options, EXTR_IF_EXISTS);
		}

		require_once 'Zend/Text/Table/Column.php';

		$column = new Zend_Text_Table_Column($content, $align, $colSpan, $encoding);

		$this->appendColumn($column);

		return $this;
	}

	/**
	 * Append a column to the row
	 *
	 * @param  Zend_Text_Table_Column $column The column to append to the row
	 * @return Zend_Text_Table_Row
	 */
	public function appendColumn(Zend_Text_Table_Column $column)
	{
		$this->_columns[] = $column;

		return $this;
	}

	/**
	 * Get a column by it's index
	 *
	 * Returns null, when the index is out of range
	 *
	 * @param  integer $index
	 * @return Zend_Text_Table_Column|null
	 */
	public function getColumn($index)
	{
		if (!isset($this->_columns[$index])) {
			return null;
		}

		return $this->_columns[$index];
	}

	/**
	 * Get all columns of the row
	 *
	 * @return array
	 */
	public function getColumns()
	{
		return $this->_columns;
	}

	/**
	 * Get the widths of all columns, which were rendered last
	 *
	 * @throws Zend_Text_Table_Exception When no columns were rendered yet
	 * @return integer
	 */
	public function getColumnWidths()
	{
		if ($this->_columnWidths === null) {
			require_once 'Zend/Text/Table/Exception.php';
			throw new Zend_Text_Table_Exception('No columns were rendered yet');
		}

		return $this->_columnWidths;
	}

	/**
	 * Render the row
	 *
	 * @param  array                               $columnWidths Width of all columns
	 * @param  Zend_Text_Table_Decorator_Interface $decorator    Decorator for the row borders
	 * @param  integer                             $padding      Padding for the columns
	 * @throws Zend_Text_Table_Exception When there are too many columns
	 * @return string
	 */
	public function render(array $columnWidths,
	Zend_Text_Table_Decorator_Interface $decorator,
	$padding = 0)
	{
		// Prepare an array to store all column widths
		$this->_columnWidths = array();

		// If there is no single column, create a column which spans over the
		// entire row
		if (count($this->_columns) === 0) {
			require_once 'Zend/Text/Table/Column.php';
			$this->appendColumn(new Zend_Text_Table_Column(null, null, count($columnWidths)));
		}

		// First we have to render all columns, to get the maximum height
		$renderedColumns = array();
		$maxHeight       = 0;
		$colNum          = 0;
		foreach ($this->_columns as $column) {
			// Get the colspan of the column
			$colSpan = $column->getColSpan();

			// Verify if there are enough column widths defined
			if (($colNum + $colSpan) > count($columnWidths)) {
				require_once 'Zend/Text/Table/Exception.php';
				throw new Zend_Text_Table_Exception('Too many columns');
			}

			// Calculate the column width
			$columnWidth = ($colSpan - 1 + array_sum(array_slice($columnWidths,
			$colNum,
			$colSpan)));

			// Render the column and split it's lines into an array
			$result = explode("\n", $column->render($columnWidth, $padding));

			// Store the width of the rendered column
			$this->_columnWidths[] = $columnWidth;

			// Store the rendered column and calculate the new max height
			$renderedColumns[] = $result;
			$maxHeight         = max($maxHeight, count($result));

			// Set up the internal column number
			$colNum += $colSpan;
		}

		// If the row doesnt contain enough columns to fill the entire row, fill
		// it with an empty column
		if ($colNum < count($columnWidths)) {
			$remainingWidth = (count($columnWidths) - $colNum - 1) +
			array_sum(array_slice($columnWidths,
			$colNum));
			$renderedColumns[] = array(str_repeat(' ', $remainingWidth));

			$this->_columnWidths[] = $remainingWidth;
		}

		// Add each single column line to the result
		$result = '';
		for ($line = 0; $line < $maxHeight; $line++) {
			$result .= $decorator->getVertical();

			foreach ($renderedColumns as $renderedColumn) {
				if (isset($renderedColumn[$line]) === true) {
					$result .= $renderedColumn[$line];
				} else {
					$result .= str_repeat(' ', strlen($renderedColumn[0]));
				}

				$result .= $decorator->getVertical();
			}

			$result .= "\n";
		}

		return $result;
	}
}
